About this Study Set
This study set covers Astrophysics through
18 practice questions.
A collection of fundamental astrophysics questions suitable for high school students, covering basic concepts and observable phenomena. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 18 questions from the
Introduction to Astrophysics study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
What is the primary source of energy for stars, including our Sun?
-
A
Chemical reactions
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B
Nuclear fusion
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C
Gravitational collapse
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D
Friction from rotation
2
Which astronomical object is characterized by a gravitational pull so strong that not even light can escape it?
-
A
White dwarf
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B
Nebula
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C
Black hole
-
D
Neutron star
3
What is the name of the galaxy our Solar System is located in?
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A
Andromeda Galaxy
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B
Magellanic Cloud
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C
Milky Way Galaxy
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D
Triangulum Galaxy
4
The Sun is a medium-sized star. What is the closest star to Earth besides the Sun?
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A
Sirius
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B
Alpha Centauri
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C
Proxima Centauri
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D
Betelgeuse
5
What force is primarily responsible for holding stars and galaxies together?
-
A
Electromagnetism
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B
Strong nuclear force
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C
Weak nuclear force
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D
Gravity
6
What are the most common elements that make up stars, like our Sun?
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A
Oxygen and Carbon
-
B
Iron and Nickel
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C
Hydrogen and Helium
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D
Nitrogen and Oxygen
7
Which celestial bodies orbit planets?
-
A
Comets
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B
Asteroids
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C
Moons
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D
Stars
8
What is a light-year a unit of?
-
A
Time
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B
Brightness
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C
Mass
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D
Distance
9
What phenomenon causes the different phases of the Moon as seen from Earth?
-
A
Earth's shadow
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B
The Moon emitting its own light
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C
The Moon's orbit around Earth and the Sun's illumination
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D
Clouds in Earth's atmosphere
10
What is a nebula?
-
A
A type of star
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B
A collection of planets
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C
An interstellar cloud of dust and gas
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D
A large asteroid
11
Which planet in our Solar System is known for its prominent rings?
-
A
Jupiter
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B
Saturn
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C
Uranus
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D
Neptune
12
What is the term for a star that has collapsed under its own gravity and is in its final stages of stellar evolution, often leaving behind a dense core?
-
A
Protostar
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B
Red giant
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C
White dwarf
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D
Supernova
13
What is the process by which planets are formed from the accretion of dust and gas in a protoplanetary disk?
-
A
Evaporation
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B
Condensation
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C
Accretion
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D
Sublimation
14
What is the term for a massive system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity?
-
A
Solar System
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B
Constellation
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C
Galaxy
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D
Cluster
15
The expansion of the universe is evidence for which major cosmological theory?
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A
Steady State Theory
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B
Big Bang Theory
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C
Oscillating Universe Theory
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D
Plasma Cosmology
16
What type of celestial object is the Sun?
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A
Planet
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B
Comet
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C
Star
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D
Asteroid
17
What instrument is used to observe distant celestial objects by collecting and focusing light?
-
A
Microscope
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B
Telescope
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C
Binoculars
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D
Periscope
18
Which of the following is the correct order of the inner planets from the Sun outwards?
-
A
Mercury, Venus, Earth, Mars
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B
Earth, Mars, Venus, Mercury
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C
Mercury, Earth, Venus, Mars
-
D
Venus, Mercury, Mars, Earth
